—Beijing of 2012 saw its first snowfall in the month of November.—Oh, it came as surprise

— Beijing of 2012 saw its first snowfall in the month of November.
—Oh, it came as surprise to us.
A. The; the
B. The; a
C. /; a
D. /; the

A. The; the(答案→)B. The; aC. /; a D. /; the解析：选B　考查冠词。句意：“2012年北京的第一场雪是在11月下的。”“噢，对于我们来说，它是一件令人惊讶的事情。”第一空由后面的2012修饰，表示特指，用定冠词the；第二空后的surprise是抽象名词具体化，表示“一件令人惊讶的事”，是泛指，用不定冠词a。

谢谢了